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description

The
grape leafhopper (
Erythroneura) is a slender yellow-coloured insect with red markings and is about 3 mm long. It feeds on developing leaves and overwinters among fallen grape leaves. It is found on the grapevine, Virginia creeper, and apple tree and is controlled by spraying or dusting.

effect on grapevines

...resulting in yellow spots on the leaves, which eventually turn yellow or brown.
Erythroneura, Typhlocyba, and
Empoasca species cause this injury to apple trees and grapevines. Grape leafhoppers reduce growth and foliage function and cause formation of grapes that are inferior in size, colour, flavour, and sugar content. Plants also are injured when insects lay eggs in...